.mask {
    width: 100%;
    height: 100%;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 10000;
    background-color: rgba(0,0,0,.5);
}
.mask .content {
    width: 220px;
    height: 100px;
    background-color: #fff;
    position: absolute;
    left: 50%;
    margin-left: -110px;
    top: 50%;
    margin-top: -50px;
    border: 1px solid #ccc;
    box-sizing: border-box;
}
.mask .content p {
    font-size: 16px;
    text-align: center;
    height: 40px;
    line-height: 40px;
}
.mask .content div {
    text-align: center;
    height: 60px;
    line-height: 60px;
}
.mask .content div button {
    vertical-align: middle;
    height:36px;
    width: 60px;
    border-radius: 5px;
    cursor: pointer;
    background-color: red;
    color: #fff;
}